How to use Eddy Dissipation rate only When using Finite rate/Eddy Dissipation model

Dziyad · February 19, 2014, 00:01

hello everybody i want simulate biomass gasification process. i have problem about first reaction. i want to create reaction vol --> aCO + bCO2 + cH2 + dC2H2. I want to set in Eddy Dissipation rate only. But in case, i am using Finite rate/Eddy Dissipation model for all reaction. How to use Eddy Dissipation rate only when using finite rate/Eddy dissipation model? Thank you very much

macfly · February 19, 2014, 09:10

In this model, the reaction rate is the smallest value between the Arrhenius and the eddy-dissipation reaction rates. Edit the parameters of the Arrhenius rate (e.g., pre-exponential factor = temperature exponent = 1e+30, activation energy = -1e+30) so that it is very high, and therefore never the smallest value.

Dziyad · February 19, 2014, 18:25

Thank you very much for the answer, macfly. It works

February 19, 2014, 00:01	How to use Eddy Dissipation rate only When using Finite rate/Eddy Dissipation model	#1
Dziyad New Member Dziyad Dzulfansyah Join Date: Jan 2014 Location: Bogor Posts: 11 Rep Power: 12	hello everybody i want simulate biomass gasification process. i have problem about first reaction. i want to create reaction vol --> aCO + bCO2 + cH2 + dC2H2. I want to set in Eddy Dissipation rate only. But in case, i am using Finite rate/Eddy Dissipation model for all reaction. How to use Eddy Dissipation rate only when using finite rate/Eddy dissipation model? Thank you very much

February 19, 2014, 09:10		#2
macfly Senior Member François Grégoire Join Date: Jan 2010 Location: Canada Posts: 392 Rep Power: 17	In this model, the reaction rate is the smallest value between the Arrhenius and the eddy-dissipation reaction rates. Edit the parameters of the Arrhenius rate (e.g., pre-exponential factor = temperature exponent = 1e+30, activation energy = -1e+30) so that it is very high, and therefore never the smallest value. Last edited by macfly; February 19, 2014 at 18:31.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
eddy dissipation model: combustion doesn't occur	roukaia	FLUENT	2	November 18, 2020 11:23
Superlinear speedup in OpenFOAM 13	msrinath80	OpenFOAM Running, Solving & CFD	18	March 3, 2015 06:36
Chemical reaction using Eddy Dissipation Model in FLUENT	hyperflow	FLUENT	5	June 11, 2012 05:54
finite rate/eddy dissipation model	roukaia	FLUENT	2	January 3, 2012 13:57
Eddy Dissipation Model	Thomas	Main CFD Forum	2	November 7, 2002 08:19

February 19, 2014, 18:25		#3
Dziyad New Member Dziyad Dzulfansyah Join Date: Jan 2014 Location: Bogor Posts: 11 Rep Power: 12	Thank you very much for the answer, macfly. It works